I know you asked for Def but anyway... I've tested the Powerball lots of times with a bunch of cabs (Bogner, 1960, Engl Standard with V60's) at my local store/importer and I must say Engl was supreme. Though it has V60's, so the Vintage cab with V30's could sound just a little better. But there wasn't a major difference, so I think you can just pick any cab you like. Although an Engl cab would look soooo cool... but it means $$$. You'll probably be fine with a 1960.

But I can hear Def's footsteps coming your way...

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